Randomness with OneRNG and NeuG [LWN.net]

Randomness with OneRNG and NeuG

Posted Jun 25, 2015 14:16 UTC (Thu) by flussence (guest, #85566)
In reply to: Randomness with OneRNG and NeuG by ttonino
Parent article: Randomness with OneRNG and NeuG

Better yet, an old analogue TV tuner. In many places they're good for nothing else now.

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Randomness with OneRNG and NeuG

Posted Jun 25, 2015 15:21 UTC (Thu) by rriggs (guest, #11598) [Link] (3 responses)

An RNG based on a radio receiver can be tampered with remotely.

Randomness with OneRNG and NeuG

Posted Jun 25, 2015 16:55 UTC (Thu) by flussence (guest, #85566) [Link] (2 responses)

That's true, though I'd question the sanity of someone invading heavily regulated spectrum with a signal strong enough to attack a cheapskate using a TV tuner as an entropy source in the first place :)

Randomness with OneRNG and NeuG

Posted Jun 25, 2015 18:03 UTC (Thu) by drag (guest, #31333) [Link] (1 responses)

It wouldn't take that much effort and signal strength to screw with a tv signal.

My thoughts are if you are not going to do it right then don't bother. Everything 'cheapskate' is going to be more expensive and more questionable then just installing haveged.

Randomness with OneRNG and NeuG

Posted Jun 25, 2015 18:24 UTC (Thu) by Cyberax (✭ supporter ✭, #52523) [Link]

Just use the least significant bits of the signal. Even strongest transmitters can't completely saturate them.